When on an experimental world, after 30 seconds of loading it up my game crashes. This has been happening since 1.17.34, I had an email saying that this issue had been solved for 1.17.40 but it hasn't

When on an experimental world, after 30 seconds of loading it up my game crashes. This has been happening since 1.17.34, I had an email saying that this issue had been solved for 1.17.40 but it hasn't, this is really starting to get on my nerves as I haven't been able to go on my world for a month now.